Question:medium
An element naturally occurs in two isotopic forms. Which of the following statements is correct?
An element naturally occurs in two isotopic forms. Which of the following statements is correct?
Show Hint
Isotopes = same protons (Z), different neutrons → different mass numbers.
Updated On: Feb 18, 2026
- Mass number of the two isotopes are same.
- Atomic number of the two isotopes are same.
- Number of nucleons are same.
- Number of neutrons are same.
Show Solution
The Correct Option is B
Solution and Explanation
Step 1: Isotopes Defined.
Isotopes are atoms of a single element sharing an atomic number (protons) but differing in mass number (neutrons).
Step 2: Options Evaluated.
- (1) Incorrect: Isotopes have different mass numbers.
- (2) Correct: Isotopes share an atomic number (same element).
- (3) Incorrect: Isotopes differ in nucleon number (mass number).
- (4) Incorrect: Isotopes have different neutron numbers.
Final Answer: \[ \boxed{\text{Atomic number of the two isotopes are same}} \]
Isotopes are atoms of a single element sharing an atomic number (protons) but differing in mass number (neutrons).
Step 2: Options Evaluated.
- (1) Incorrect: Isotopes have different mass numbers.
- (2) Correct: Isotopes share an atomic number (same element).
- (3) Incorrect: Isotopes differ in nucleon number (mass number).
- (4) Incorrect: Isotopes have different neutron numbers.
Final Answer: \[ \boxed{\text{Atomic number of the two isotopes are same}} \]
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